Read the article. It only pertains to data from spy satellites that are looking at the earth and catching fireballs that already hit the atmosphere. It has nothing to do with "incoming" rocks that are still out there.

Quoting: Astromut

yea, right...i mean if they would classify something like this, surely they wouldn't classify anything else.

Quoting: Anonymous Coward 14249834

No reason to, nor ability to. Amateurs can and do detect new asteroids, in fact our astrometric data is used to refine the orbits of asteroids after they're discovered; until that is done, no one can even know if a potentially threatening rock is truly going to impact or not.